1366 - Incorrect integer value: '' for column 'customer_id' at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', '44cfda9871662b82db42360a1bbe0cf8', '34.229.50.161', '1711652428', '1711652428', '/redirect.php?action=product&id=3')

[XT SQL Error]